This is a wonderful collection of stories, recommended for every Swahili learner. Some tales are more interesting, some are less, but the idiomatic use of the language makes it worthwhile to read.
The scan has some pecularities - there are some extra stories inserted at the end (but the quality is sometimes so bad that it renders the text illegible), and there are some missing pages.
As for the missing pages, I have uploaded them here:
http://www.archive.org/details/MissingPagesFromSwahiliStoriesFromArabSources